Measurement of the gradient of the Casimir force between a nonmagnetic sphere and a magnetic plate

Abstract

We measured the gradient of the Casimir force between an Au sphere and a plate made of ferromagnetic metal (Ni). It is demonstrated that the magnetic properties influence the force magnitude. This opens prospective opportunities for the control of the Casimir force in nanotechnology and for obtaining Casimir repulsion by using ferromagnetic dielectrics.

15 pages, 4 figures, to appear in Phys. Rev. B

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